CVE-2026-74456: can: peak_usb: peak_usb_start(): fix double free of transfer buffer on URB submit error
CSIRTS triage
- What
- Double free of transfer buffer in peak_usb_start() on URB submission error.
- Who is affected
- Systems running affected Linux kernel versions with peak_usb CAN driver when device URB submission fails.
- Urgency
- Low; double free requires error path trigger but can cause kernel crash or memory corruption.
- Action
- Apply kernel patch removing duplicate buffer free or update to patched kernel version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74456
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-744560.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-74456 | coverage & exploitation status | NVD · CVE.org |
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